Must be a NZ thing, I also shoot mine with Australian Winchester subsonic hollow points through a suppressor, and the last time I benched it the 100 yard group for 10 shots was 1.75 inches and 50 just on .75.
The rifle is 18 years old and has shot over 5000 rounds. The only mod is a slip on recoil pad to make the stock suitable for someone taller than 4 foot tall.